SECAI Core · phase 1 of 15 · noun

Unsupervised learning

A category of machine learning that does not use labeled data to predict outcomes, but instead relies on the computer to sort out patterns and similarities in the larger dataset.

The Explain card

Plain English
Unsupervised learning gives the machine data without labels and lets it find the patterns, groups and similarities on its own.
Example
A security team feeds raw authentication logs into a clustering algorithm. It groups logins into natural clusters, and one small odd cluster turns out to be a service account being used from three countries at once.
Why it matters
Unsupervised models surface what is unusual, which makes them great for anomaly detection, but they also find patterns nobody asked for, including sensitive groupings that raise privacy and bias questions.
Hook
No answer key, just "sort this pile and tell me what looks odd."

Word knowledge

How the word is built, where it came from, and what it sits beside in memory.

In a sentence

The SIEM ran unsupervised learning on last week's DNS queries and grouped the lookups so the analyst could inspect the small clusters.

Why these words
  • unsupervised English un- (not) plus Latin supervisus, overseen, from supervidere, to look over marks the training as happening with no overseer, the un- that opposes supervised
  • learning Old English leornung, the act of getting knowledge names the classroom activity the phrase assigns to a machine
Where it came from
Origin
English compound from un- (not) plus Latin supervisus (overseen, from super, over, and videre, to see) and Old English leornung (the act of getting knowledge)
Entered the language
1960s
What changed
Unsupervised had meant a person working with no overseer since the late 1700s. Learning had meant a person acquiring knowledge. Pattern-recognition labs in the 1960s joined them as the name for training without a teacher, and the pair became the ordinary label for that family of methods.
How it is spelled
Pattern
un- is the native English prefix for not, written solid with the stem
Pattern
super- keeps its Latin spelling and its sense of over
Pattern
-vise from Latin videre always takes s, never z
Pattern
-ed marks the past participle used as an adjective
Pattern
-ing turns a verb into a noun of activity
Breaks the pattern
the noun phrase stays two words; the hyphen appears only when it modifies another noun
Breaks the pattern
supervise is not an -ize verb; the s is from vis, see, so American spelling still writes s

Spelled like

  • unexpected
  • untrained
  • revise
  • supervisor
Broken into chunks
  • un
    • unexpected
    • unpaid
    • untrained
  • super
    • superhuman
    • superintendent
    • superimpose
  • vise
    • revise
    • advise
    • televise
  • ed
    • trained
    • marked
    • unexpected
  • learn
    • learner
    • unlearn
    • relearn
  • ing
    • training
    • computing
    • reasoning
What it sits beside

Same subject

Same shape

Learning compounds

Un- family

  • unexpected
  • untrained
  • unpaid

Training regimes

Where it sits in the deck

Phase 1: What AI Is: Core Concepts and Paradigms

You cannot secure, govern, or attack something you cannot define — establish what AI actually is before any other concept can land.

Neighbours in this phase